WO2020243867A1

WO2020243867A1 - Camera module and periscope camera

Info

Publication number: WO2020243867A1
Application number: PCT/CN2019/089730
Authority: WO
Inventors: 李林珍; 储著明; 徐同明; 赵后伟; 陈凯
Original assignee: 瑞声光学解决方案私人有限公司
Priority date: 2019-06-01
Filing date: 2019-06-01
Publication date: 2020-12-10
Also published as: US20200379207A1; JP2021524934A; US11874521B2

Abstract

A camera module (10) and a periscope camera (100), the camera module (10) comprising a housing (1) having an accommodating cavity (11), a lens assembly (2) provided in the accommodating cavity (11) and movable relative to the housing (1), a focusing driving assembly (42) provided in the accommodating cavity (11) and used for driving the lens assembly (2) to move along an optical axis direction, an anti-shake driving assembly (41) provided in the accommodating cavity (11) and used for driving the lens assembly (2) to move along a first direction perpendicular to the optical axis, and a supporting and guiding assembly (3) provided in the accommodating cavity (11) and used for supporting the lens assembly (2) and guiding the lens assembly (2) to move. The supporting and guiding assembly (3) comprises a first magnet portion (31) fixed on the lens assembly (2), a second magnet portion (32) fixed on the housing (1) and provided opposite the first magnet portion (31) at an interval, and balls (33) provided between the first magnet portion (31) and the second magnet portion (32); and the lens assembly (2) is in rolling connection with the housing (1) by means of the supporting and guiding assembly (3). The camera module guides the lens assembly (2) by means of the balls (33) sandwiched between the first magnet portion (31) and the second magnet portion (32) to achieve reset, and this design saves internal space, and facilitates assembly.

Description

Camera module and periscope camera

Technical field

The invention relates to the field of periscope camera, in particular to a camera module and a periscope camera using the camera module.

Background technique

The periscope camera generally includes a camera module and a prism module arranged on one side of the camera module. In the prior art, the lens has autofocus and optical image stabilization functions, and its support and resetting are generally through suspension wires. Such a large space occupation and inconvenient assembly.

Therefore, it is necessary to provide a camera module with a small space occupied by the supporting and guiding assembly and easy to assemble.

technical problem

The purpose of the present invention is to provide a camera module with a small space occupied by the supporting and guiding assembly and easy to assemble.

Technical solutions

The technical scheme of the present invention is as follows:

Provided is a camera module, which includes a housing with an accommodating cavity, a lens assembly arranged in the accommodating cavity and movable relative to the housing, and arranged in the accommodating cavity for driving the lens assembly A focus drive assembly that moves along the optical axis, an anti-shake drive assembly that is arranged in the accommodating cavity for driving the lens assembly to move in a first direction perpendicular to the optical axis, and is arranged in the accommodating cavity to A support and guide assembly for supporting the lens assembly and guiding the movement of the lens assembly. The support and guide assembly includes a first magnet part fixed on the lens assembly, fixed on the housing and connected to the first magnet part. A second magnet part arranged opposite to the magnet part at intervals and a ball arranged between the first magnet part and the second magnet part, the lens assembly is connected to the housing through the support and guide assembly; The first magnet part and the second magnet part attract each other along perpendicular to the optical axis and the first direction to suspend the lens assembly in the accommodating cavity, and the ball is clamped on the Roll between the first magnet part and the second magnet part and between the first magnet part and the second magnet part to guide the lens assembly.

Further, the side of the first magnet part and/or the second magnet part close to the ball is recessed in a direction away from the ball to form a relief groove, and the ball is received in the relief groove and Roll in the relief slot.

Further, the first magnet part includes a first support part fixed to the lens assembly and a first magnetic steel embedded in the first support part, and the second magnet part includes a first support part fixed to the housing The second support portion and a second magnetic steel embedded in the second support portion, the ball is sandwiched between the first support portion and the second support portion, and the relief groove is formed in the The first support portion and/or the second support portion.

Further, the number of the support and guide components is an even number, all the support and guide components are divided into two groups, and the two groups of the support and guide components are symmetrically distributed on both sides of the central axis of the lens assembly.

Further, the first magnet and the second magnet are both cylindrical, and in the initial state, the central axis of the first magnet and the central axis of the second magnet both pass through the ball The centers of are perpendicular to the direction of the optical axis of the lens assembly.

Further, the lens assembly includes a bracket arranged at a distance from the housing and a lens module mounted on the bracket, and the first magnet part is fixed to the bracket.

Further, the first supporting portion is formed on the bracket and integrally formed with the bracket, and/or the second supporting portion is formed on the housing.

Further, the support includes support arms arranged oppositely and spaced apart along the first direction, and a bottom arm connected between the support arms, and the lens module is supported by the bottom arm and located on the support. Between the arms.

Further, a side of the support arm away from the second magnet portion is recessed and formed with a first receiving groove, and the anti-shake drive assembly includes a first magnetic block fixed to the first receiving groove, and a first magnetic block fixed to the first receiving groove. The first coil of the housing, the first coil cooperates with the first magnetic block to drive the lens assembly to move in a first direction; and/or,

The number of the anti-shake driving components is two, and the two anti-shake driving components are symmetrically distributed on both sides of the central axis of the lens component.

Further, a second receiving groove is recessed on the side of the support arm away from the lens module, and the focus drive assembly includes a second magnetic block fixed to the second receiving groove, and a second magnetic block fixed to the housing The second coil of the second coil cooperates with the second magnetic block to drive the lens assembly to move along the optical axis direction of the lens assembly; and/or,

The number of the focus driving components is two, and the two focus driving components are symmetrically distributed on both sides of the central axis of the lens component.

The present invention also provides a periscope camera including the above-mentioned camera module and a prism module arranged at one end of the camera module.

Beneficial effect

The beneficial effect of the present invention is that the first magnet part is fixed on the lens assembly, the second magnet part is fixed on the housing, and the ball is clamped between the first magnet part and the second magnet part, so that the lens assembly When moving, the ball will be positioned between the first magnet part and the second magnet part under the action of the magnetic field, so that the first magnet part drives the lens assembly to reset, which can save internal space and facilitate assembly.

Description of the drawings

FIG. 1 is a schematic structural diagram of a periscope camera provided by an embodiment of the present invention;

Figure 2 is a diagram of the internal light path of the periscope camera;

3 is a schematic structural diagram of a camera module provided by an embodiment of the present invention;

4 is a schematic cross-sectional view of the camera module in FIG. 2 along the line A-A (the direction indicated by the arrow is the cutting direction);

Figure 5 is a schematic diagram of the internal structure of the camera module in Figure 2;

Fig. 6 is an exploded schematic diagram of the camera module in Fig. 2.

100. Periscope camera; 10, camera module; 1. housing; 11, accommodating cavity; 2. lens assembly; 21, lens module; 22, bracket; 3. support and guide assembly; 31, first magnet part 32, second magnet part; 33, ball; 220, relief groove; 311, first support part; 312, first magnet; 321, second support part; 322, second magnet; 221, support arm 222, bottom arm; 223, first receiving slot; 224, second receiving slot; 41, anti-shake drive assembly; 411, first coil; 412, first magnetic block; 42, focus drive assembly; 421, second Coil; 422, the second magnetic block; 20, the prism module.

Embodiments of the invention

The present invention will be further described below with reference to the drawings and embodiments.

A camera module 10, please refer to FIG. 1 to FIG. 6, comprising a housing 1 with a housing cavity 11, a lens assembly 2 arranged in the housing cavity 11 and movable relative to the housing 1 The accommodating cavity 11 uses a focus drive assembly 42 for driving the lens assembly 2 to move along the optical axis direction, and is arranged in the accommodating cavity 11 for driving the lens assembly 2 along the vertical optical axis. An anti-shake drive assembly 41 that moves in one direction and a support and guide assembly 3 arranged in the accommodating cavity 11 to support the lens assembly 2 and guide the movement of the lens assembly 2, the support and guide assembly 3 includes a fixed The first magnet portion 31 on the lens assembly 2, the second magnet portion 32 fixed on the housing 1 and spaced opposite to the first magnet portion 31, and the second magnet portion 32 provided on the first magnet portion 31 and The balls 33 between the second magnet parts 32, the lens assembly 2 is connected to the housing 1 through the support and guide assembly 3, and the first magnet part 31 and the second magnet part 32 are perpendicular to each other. Attract each other in the optical axis and the first direction to suspend the lens assembly 2 in the accommodating cavity 11, and the ball 33 is sandwiched between the first magnet portion 31 and the second magnet portion 31 Roll between the magnet parts 32 and between the first magnet part 31 and the second magnet part 32 to guide the lens assembly 2.

The first magnet part 31 and the second magnet part 32 attract each other to form a magnetic spring, and the ball 33 functions as a support and guide. Specifically, when the lens assembly 2 moves along the optical axis or the first direction during operation, the first magnet part 31 follows the movement of the lens assembly 2 and is misaligned with the second magnet portion 32 to generate restoring force. When resetting, the first magnet portion 31 moves under the mutual magnetic force between the second magnet portions 32. The ball 33 is a magnetically conductive ball. Under the action of the magnetic field, it is positioned to the exact center of the two magnet parts so that the ball 33 will not get stuck on the edge.

Preferably, referring to FIG. 4, the side of the first magnet portion 31 and/or the second magnet portion 32 close to the ball 33 is recessed in a direction away from the ball 33 to form a relief groove 220, so The ball 33 is received in the relief groove 220 and rolls in the relief groove 220.

The relief groove 220 plays a role of limiting the rolling range of the ball 33. Understandably, it also plays a role of limiting the rolling of the lens assembly 2. The relief groove 220 can be formed on the first magnet portion 31. , It can also be formed on the second magnet portion 32, and can also be formed on the first magnet portion 31 and the second magnet portion 32.

Preferably, referring to FIG. 5, the first magnet portion 31 includes a first support portion 311 fixed to the lens assembly 2 and a first magnet 312 embedded in the first support portion 311. The second magnet portion 32 includes a second support portion 321 fixed to the housing 1 and a second magnetic steel 322 embedded in the second support portion 312, and the ball 33 is sandwiched between the first support portion 311 Between the second support portion 321 and the second support portion 321, the relief groove 220 is formed on the first support portion 311 and/or the second support portion 321.

The first support portion 311 is used to install the first magnet 312, the second support portion 321 is used to install the second magnet 322, the first support portion 311 and the second support portion 321 are both fixed on the lens assembly 2, and the slot 220 can be formed on the first supporting portion 311, the second supporting portion 321, or the first supporting portion 311 and the second supporting portion 321.

The number of the supporting and guiding components 3 is an even number. All the supporting and guiding components 3 are divided into two groups, and the two groups of the supporting and guiding components 3 are symmetrically distributed on both sides of the central axis of the lens component 2.

The two sets of support and guide assemblies 3 are symmetrically distributed, so that the two sides of the lens assembly 2 are evenly stressed. The number of support and guide assemblies 3 is limited to four, and two are provided on each side.

Preferably, referring to FIG. 6, the first magnet 312 and the second magnet 322 are both cylindrical, and the central axis of the first magnet 312 and the second magnet 322 in the initial state The central axis of each passes through the center of the ball 33 and is perpendicular to the optical axis of the lens assembly 2.

The cylindrical magnets ensure the isotropy of the return stiffness. The central axis of the first magnet 312 and the central axis of the second magnet 322 are perpendicular to the direction in which the lens assembly 2 moves. Therefore, it is understandable that the first magnet 312 and the second magnet 312 The restoring force of the magnet 322 is parallel to the moving direction of the lens assembly 2.

Preferably, referring to FIG. 6, the lens assembly 2 includes a bracket 22 spaced apart from the housing 1 and a lens module 21 mounted on the bracket 22, and the first magnet part 31 is fixed to the bracket 22 .

Preferably, the first supporting portion 311 is formed on the bracket 22 and integrally formed with the bracket 22, and/or the second supporting portion 321 is formed on the housing 1.

The bracket 22 is used to mount the lens module 21, and the first supporting portion 311 and the second supporting portion 321 are respectively integrally formed with the bracket 22 to make the connection more stable.

Preferably, the bracket 22 includes supporting arms 221 arranged oppositely and spaced apart along the first direction, and a bottom arm 222 connected between the supporting arms 221, and the lens module 21 is formed by the bottom arm 222. It is supported and located between the supporting arms 221.

One supporting arm 221, one bottom arm 222, the other supporting arm 221, and the other bottom arm 222 are connected at intervals to form a frame shape. The bottom arm 222 serves to fix the lens module 21, and the supporting wall 221 serves to limit the lens module 21 The role of.

Preferably, referring to FIGS. 5 and 6, the supporting arm 221 has a first receiving groove 223 recessed on one side away from the second magnet portion 32, and the anti-shake driving assembly 41 includes a The first magnetic block 412 of the receiving slot 223 and the first coil 411 fixed to the housing 1, the first coil 411 cooperates with the first magnetic block 412 to drive the lens assembly 2 to move in the first direction; And/or,

The number of the anti-shake driving components 41 is two, and the two anti-shake driving components 41 are symmetrically distributed on both sides of the central axis of the lens assembly 2.

There are preferably two anti-shake drive components 41, the first coil 411 is parallel to the first magnetic block 412, the first coil 411 is in a racetrack shape, and the central axis of the first coil 411 is perpendicular to the cavity bottom of the accommodating cavity 11 and is opposite to the first coil 411. A coil 411 is energized to generate a magnetic field, and generates a force perpendicular to the optical axis of the lens assembly 2 to the first magnetic block 412, thereby driving the lens assembly 2 to move and realize anti-shake.

Preferably, referring to FIG. 6, a second receiving groove 224 is recessed on the side of the support arm 221 away from the lens module 2, and the focus driving assembly 42 includes a second receiving groove 224 fixed to the second receiving groove 224. Two magnetic blocks 422, and a second coil 421 fixed to the housing 1. The second coil 421 cooperates with the second magnetic block 422 for driving the lens assembly 2 along with the lens assembly 2 Move in the direction of the optical axis; and/or,

The number of the focus drive assembly 42 is two, and the two focus drive assemblies 42 are symmetrically distributed on both sides of the central axis of the lens assembly 2.

There are preferably two focusing drive components 42. The second coil 421 is parallel to the second magnetic block 422, the second coil 421 is in the shape of a racetrack, and the central axis of the second coil 421 is parallel to the bottom of the accommodating cavity 11. The coil 421 is energized, generates a magnetic field, and generates a force along the optical axis on the second magnetic block 422, thereby driving the lens assembly 2 to move.

The present invention also provides a periscope camera 100, please refer to Figures 1 to 2, including the above-mentioned camera module 10 and a prism module 20 arranged at one end of the camera module, with arrows in Figure 2 The dashed line in shows the light path of the periscope camera 100, and the arrow direction is the light irradiation direction.

In the camera module 10 provided in this embodiment, the focus and anti-shake drive system adopts two sets of symmetrically distributed electromagnetic structures to prevent the lens assembly 2 from deflection.

The first magnet 312 and the second magnet 322 attract each other to form a magnetic spring. When the lens assembly 2 moves in translation, the two magnets can generate restoring force. The focus direction and the anti-shake direction share the magnetic spring, which can save internal space. The two magnets are compressed by the attraction force to support and roll, and the ball 33 will be positioned to the center line of the first magnet 312 and the second magnet 322 under the action of the magnetic field, thereby resetting the lens assembly 2. This design is convenient Assemble, the reset effect is good.

The above are only the embodiments of the present invention. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all belong to the present invention. The scope of protection.

Claims

A camera module, characterized in that it comprises a housing with a containing cavity, a lens assembly arranged in the containing cavity and movable relative to the housing, and arranged in the containing cavity for driving the The lens assembly moves along the optical axis direction of the focus drive assembly, the lens assembly is arranged in the accommodating cavity for driving the lens assembly to move in the first direction perpendicular to the optical axis, and the anti-shake drive assembly is arranged in the housing A support and guide assembly for supporting the lens assembly and guiding the movement of the lens assembly is used in the cavity. The support and guide assembly includes a first magnet part fixed on the lens assembly, fixed on the housing and connected to the The first magnet part is provided with a second magnet part opposed to each other at intervals and a ball arranged between the first magnet part and the second magnet part, and the lens assembly is connected to the housing through the support and guide assembly in rolling connection The first magnet portion and the second magnet portion are mutually attracted along perpendicular to the optical axis and the first direction to suspend the lens assembly in the accommodating cavity, and the ball clamp Roll between the first magnet part and the second magnet part and between the first magnet part and the second magnet part to guide the lens assembly.
The camera module according to claim 1, wherein a side of the first magnet part and/or the second magnet part close to the ball is recessed in a direction away from the ball to form a relief groove , The ball is accommodated in the relief groove and rolls in the relief groove.
The camera module according to claim 2, wherein the first magnet part comprises a first support part fixed to the lens assembly and a first magnet embedded in the first support part, so The second magnet portion includes a second support portion fixed to the housing and a second magnet embedded in the second support portion, and the ball is sandwiched between the first support portion and the second support Between the parts, the relief groove is formed in the first supporting part and/or the second supporting part.
The camera module according to claim 1, wherein the number of the supporting and guiding components is an even number, all the supporting and guiding components are divided into two groups, and the two groups of supporting and guiding components are symmetrically distributed on the lens Both sides of the central axis of the component.
The camera module according to claim 1, wherein the first magnet and the second magnet are both cylindrical, and in the initial state, the central axis of the first magnet and the first magnet The central axes of the two magnets both pass through the center of the ball and are perpendicular to the optical axis of the lens assembly.
The camera module according to claim 3, wherein the lens assembly includes a bracket spaced apart from the housing and a lens module mounted on the bracket, and the first magnet part is fixed to the bracket .
The camera module according to claim 6, wherein the first supporting portion is formed on the bracket and integrally formed with the bracket, and/or the second supporting portion is formed on the housing.
The camera module according to claim 7, wherein the bracket includes supporting arms arranged opposite and spaced apart along the first direction, and a bottom arm connected between the supporting arms, and the lens mold The group is supported by the bottom arm and located between the support arms.
8. The camera module according to claim 8, wherein a first receiving groove is recessed on a side of the support arm away from the second magnet part, and the anti-shake driving assembly includes a The first magnetic block in the receiving slot and the first coil fixed to the housing, the first coil and the first magnetic block cooperate to drive the lens assembly to move in the first direction; and/or,

The number of the anti-shake driving components is two, and the two anti-shake driving components are symmetrically distributed on both sides of the central axis of the lens component.
8. The camera module according to claim 8, wherein a second receiving groove is recessed on the side of the support arm away from the lens module, and the focus driving assembly includes a second receiving groove And a second coil fixed to the housing, and the second coil cooperates with the second magnetic block to drive the lens assembly to move along the optical axis direction of the lens assembly; And/or,

The number of the focus driving components is two, and the two focus driving components are symmetrically distributed on both sides of the central axis of the lens component.
A periscope camera, which is characterized in that it comprises the camera module according to any one of claims 1-10 and a prism module provided at one end of the camera module.